TIMED HELP! Pilar wanted to use estimation to solve a decimal addition problem. She correctly used estimation to rewrite the problem as 12 + 3 + 5 + 6. What could her original problem have been? A. 12.38 + 4.45 + 4.14 + 6.7 B. 12.5 + 3.05 + 5.23+ 0.6 C. 11.5011 + 3.6 + 5.17 + 5.7 D. 11.75 + 3.299 + 5.31 + 6.27

D. 11.75 + 3.299 + 5.31 + 6.27

Step-by-step explanation:

11.75 would round up to 12, 3.299 would round down to 3, 5.31 would round down to 5 and 6.27 would round down to 6

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.